who heres runs a blow thru set up?? im planning on trying this out when i do my intercooler piping, and i want to know what do i do with the vac line on the intake pipe thats between the maf and turbo??? this vacum line runs from the intake to the Tb. what do i do with it when i run a blow thru settup?? do i just plug the line, or leave it?? i was thinking that if i just left it, then it would be sucking up unmetered air. if i plug it, can i then use the nipple on the tB as a source for my boost gauge instead of having it T'd into the fpr like i have it now??? or do i have to reroute the line to be between the maf and tB when i do the blow thru setup?? i need all the input i can get on this!!

TIA!!

If you plug that line it will idle like shit, what i did was got a lil fitting from home depot and welded it after the MAF, on mine there was 2 of these lines one big one and one small one they are both for the idle controll, i think, but i know if u plug them it will idle like shit. Anyway just stick the MAF in the IC pipe with smooth transitions and you will be good, no tunning needed, throtle response improves, and the car idles and drives way smoother in closed loop.

Blow through, the only way to go :biggthump

Help an Idiot:

Are you blowing through, just to trick the ECU into thinking it's NA because there are only temperature corrections and not pressure corrections to mass flow through the MAF. Nice idea if it is.

Help an Idiot:

Are you blowing through, just to trick the ECU into thinking it's NA because there are only temperature corrections and not pressure corrections to mass flow through the MAF. Nice idea if it is.
its not really to tirck the ecu. Basicly, when you run a blow through, you get better throttle response because as soon as you hit boost, the maf meters that boost pressure right away, triggers the ecu to supply the fuel for the pressured air, and that's what makes better, instant throttle responce. People also run blow through setups because you can run an open b.ov. Without the stalling issues. By placing the b.o.v. Before the maf, the maf will not meter air that's going to be blown off! With the maf after the b.o.v., the b.o.v. Will blow off the air before any of that air gets to the maf and metered. So you won't stall from blowing off to the atmosphere and you also won't be running pig rich between shifts or during throttle release! This is just my concept of a blow through setup, if anyone here has other info that I left out or should know about please feel free to post!

If you plug that line it will idle like shit, what i did was got a lil fitting from home depot and welded it after the MAF

Blow through, the only way to go :biggthump
are you talking about the barb fittings?? If so, I already have a couple ready to be welded onto the coldside piping for the wastgate and charcoal canister lines. So your saying I should just get another barb fitting and weld it onto the i/c coldside after the maf and before the tb and run the vac line that way?? Sounds logical

i have a blow through setup. its excellent. that vacum line you are talking about concerns me, mine is plugged and i have a shitty idle... when the car was NA i pulled that line to see what it did and it didnt seem to affect much. maybe i will thread a fitting in and see what happens.

Yes unless you are running the stock DET intake pipe then you can just leave em in the stock place. If not do what i did get the barbed fittings and weld em in.

Yes unless you are running the stock DET intake pipe then you can just leave em in the stock place. If not do what i did get the barbed fittings and weld em in.
A pic would be nice.

I've been reading about this blow through set up, very interesting stuff.
Am I right in saying that as maf's dont take kindly to oil, the crankcase breather system would have to be diverted from the intake system, also if the oil seals in the turbo were to fail then the maf would get knackered???

i am planing on getting that fmax stage 1 turbo kit. would i need to replace the clutch with a better one or can i still run my stock one

supposedly, i read somewhere that the maf element itself heat up to like a gazillion degrees and burns off all the residue in the maf :confused:

i am planing on getting that fmax stage 1 turbo kit. would i need to replace the clutch with a better one or can i still run my stock one

Where did that come from??

I am considering a blow through setup. I hear they work great, plus I won't have to worry as much about idle problems and dying after boost anymore!

Corey

1) LOL FMAX doesent even exist anymore anyway.

2) What does your clutch got to do with this thread?


BTW ill take pics of where i connected the lines for the guy that asked.

who heres runs a blow thru set up?? im planning on trying this out when i do my intercooler piping, and i want to know what do i do with the vac line on the intake pipe thats between the maf and turbo??? this vacum line runs from the intake to the Tb. what do i do with it when i run a blow thru settup?? do i just plug the line, or leave it?? i was thinking that if i just left it, then it would be sucking up unmetered air. if i plug it, can i then use the nipple on the tB as a source for my boost gauge instead of having it T'd into the fpr like i have it now??? or do i have to reroute the line to be between the maf and tB when i do the blow thru setup?? i need all the input i can get on this!!

TIA!!

just put the line on the IC piping right before the TB. you can use the little metal piece that is in the stock intake pipe and weld it onto the piping.

Guys, why would you want that line to see boost. If you run that line into the IC piping it will pressurize the valve cover. Which is not good. Just leave it in your intake pipe.

They are not talking about the PCV line. They are talking about the 2 lines that go from the throttle body to the intake pipe on the turbo and one actually goes to the IC pipe, its for idle controll.

BTW i basically did what Will said.

[QUOTE=SR20DETP10]1) LOL FMAX doesent even exist anymore anyway.

We'll turbonetic's is still calling it the fmax kit do to them buying fmax a couple of years ago.my .02

I have seen a couple blow through setups , I just dont like the idea of the oil and such getting on the MAF ... and if you run a Cobra or 300Z MAF the burn off cycle is disabled , so it will build up pretty quick ... The idle control hose will have to go to a metered air source , or remove the idle controls all together and run a set idle ...

Can you put the MAF between the I/C and the T/B? If so, it won't get oily and it won't see very hot air. As far as i'm concerned, it's like having it on the intake pipe. I've never seen any oil between the I/C and T/B.

Can you put the MAF between the I/C and the T/B? If so, it won't get oily and it won't see very hot air. As far as i'm concerned, it's like having it on the intake pipe. I've never seen any oil between the I/C and T/B.
thats a good point^